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TDCS studies have recently faced strong criticism for exhibiting both a large intra- and inter-subject response variability and a low reproducibility of effects. We here attempt to replicate one of our own recent studies. In this study, we found a rightward shift of spatial attention bias, relative to a leftward (“pseudoneglect”) bias at baseline (as indexed by the landmark task) using a bi-hemispheric...
We present a new method for routing MAC frames at layer 2 (L2) within an 802.11 MANET. The new method, Multihop Clear Channel Assessment (MCCA), improves on the RTS/CTS mechanism used in the 802.11 DCF by extending it from a single hop protocol to a multihop one. Such an approach can, in some circumstances, eliminate the need for a routing protocol at layer 3 (L3), since frames, instead of being routed...
We present a discussion and study of the RTS/CTS channel clearing mechanism used in the 802.11 DCF and propose a possible improvement. We focus on why the current mechanism is only a single hop process, what disadvantages this presents and what advantages a multihop version of RTS/CTS would bring. We describe why the proposed multihop approach, called multihop clear channel assessment (MCCA), brings...
The authors implemented a modified photovoice project, Ngudo Nga Zwinepe (NNZ) (Learning through Photos), in a village in Limpopo Province, South Africa where water resources are scarce and often contaminated. This project is a first step in a collaboration between the University of Virginia and the University of Venda to develop a model for sustainable water, health and environmental development...
With increased service demands on remote sensing and communication satellites researchers are considering equipping the next generation of satellite constellations with onboard computer systems capable of general purpose computing in space. This project focuses on the design of an emulator capable of using a local area network to emulate both the passing of data between satellites and to ground-based...
The concept regarding esophageal squamous metaplasia, its existence, origin and the role it plays in the etiology of esophageal carcinoma, needs some urgent attention. Explanations regarding the presence of metaplastic squamous epithelial cells on esophageal smears, from asymptomatic high-risk patients undergoing screening for esophageal carcinoma, are difficult to find. The presence of squamous metaplastic...
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